From: "kirill.shutemov@linux.intel.com" <kirill.shutemov@linux.intel.com>
To: "Huang, Kai" <kai.huang@intel.com>
Cc: "tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"x86@kernel.org" <x86@kernel.org>, "bp@alien8.de" <bp@alien8.de>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
"Reshetova, Elena" <elena.reshetova@intel.com>,
"Nakajima, Jun" <jun.nakajima@intel.com>,
"rafael@kernel.org" <rafael@kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"sathyanarayanan.kuppuswamy@linux.intel.com"
<sathyanarayanan.kuppuswamy@linux.intel.com>,
"Hunter, Adrian" <adrian.hunter@intel.com>,
"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>,
"ashish.kalra@amd.com" <ashish.kalra@amd.com>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"seanjc@google.com" <seanjc@google.com>,
"bhe@redhat.com" <bhe@redhat.com>,
"linux-coco@lists.linux.dev" <linux-coco@lists.linux.dev>
Subject: Re: [PATCHv3 03/14] cpu/hotplug: Add support for declaring CPU offlining not supported
Date: Tue, 21 Nov 2023 12:31:05 +0300 [thread overview]
Message-ID: <20231121093105.ev77pgbssq6scugm@box.shutemov.name> (raw)
In-Reply-To: <dbb07c1ba14dc1bd3066aa8b784b884c67638ac1.camel@intel.com>
On Tue, Nov 21, 2023 at 02:15:59AM +0000, Huang, Kai wrote:
> On Wed, 2023-11-15 at 15:00 +0300, Kirill A. Shutemov wrote:
> > The ACPI MADT mailbox wakeup method doesn't allow to offline CPU after
> > it got woke up.
> >
> > Currently offlining hotplug is prevented based on the confidential
> > computing attribute which is set for Intel TDX. But TDX is not
> > the only possible user of the wake up method. The MADT wakeup can be
> > implemented outside of a confidential computing environment. Offline
> > support is a property of the wakeup method, not the CoCo implementation.
> >
> > Introduce cpu_hotplug_not_supported() that can be called to indicate
> > that CPU offlining should be disabled.
>
> cpu_hotplug_not_supported() -> cpu_hotplug_disable_offlining().
Right.
> >
> > This function is going to replace CC_ATTR_HOTPLUG_DISABLED for ACPI
> > MADT.
>
> Is MADT too generic? MADT wakeup?
I'll replace it with "ACPI MADT wakeup method".
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2023-11-21 9:31 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-15 12:00 [PATCHv3 00/14] x86/tdx: Add kexec support Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 01/14] x86/acpi: Extract ACPI MADT wakeup code into a separate file Kirill A. Shutemov
2023-11-21 2:08 ` Huang, Kai
2023-11-15 12:00 ` [PATCHv3 02/14] x86/apic: Mark acpi_mp_wake_* variables as __ro_after_init Kirill A. Shutemov
2023-11-21 2:08 ` Huang, Kai
2023-11-15 12:00 ` [PATCHv3 03/14] cpu/hotplug: Add support for declaring CPU offlining not supported Kirill A. Shutemov
2023-11-21 2:15 ` Huang, Kai
2023-11-21 9:31 ` kirill.shutemov [this message]
2023-11-15 12:00 ` [PATCHv3 04/14] cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 05/14] x86/kvm: Do not try to disable kvmclock if it was not enabled Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 06/14] x86/kexec: Keep CR4.MCE set during kexec for TDX guest Kirill A. Shutemov
2023-11-15 12:23 ` Peter Zijlstra
2023-11-15 13:03 ` Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 07/14] x86/mm: Make x86_platform.guest.enc_status_change_*() return errno Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 08/14] x86/mm: Return correct level from lookup_address() if pte is none Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 09/14] x86/tdx: Account shared memory Kirill A. Shutemov
2023-11-21 2:47 ` Huang, Kai
2023-11-21 9:42 ` kirill.shutemov
2023-11-21 9:49 ` kirill.shutemov
2023-11-15 12:00 ` [PATCHv3 10/14] x86/tdx: Convert shared memory back to private on kexec Kirill A. Shutemov
2023-11-21 3:46 ` Huang, Kai
2023-11-21 9:58 ` kirill.shutemov
2023-11-22 10:07 ` Huang, Kai
2023-11-23 13:47 ` kirill.shutemov
2023-11-15 12:00 ` [PATCHv3 11/14] x86/mm: Make e820_end_ram_pfn() cover E820_TYPE_ACPI ranges Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 12/14] x86/acpi: Rename fields in acpi_madt_multiproc_wakeup structure Kirill A. Shutemov
2023-11-15 12:00 ` [PATCHv3 13/14] x86/acpi: Do not attempt to bring up secondary CPUs in kexec case Kirill A. Shutemov
2023-11-15 20:12 ` Kuppuswamy Sathyanarayanan
2023-11-15 12:00 ` [PATCHv3 14/14] x86/acpi: Add support for CPU offlining for ACPI MADT wakeup method Kirill A. Shutemov
2023-11-23 9:38 ` Huang, Kai
2023-12-01 15:57 ` kirill.shutemov
2023-12-04 22:43 ` Huang, Kai
2023-11-16 12:10 ` [PATCHv3 00/14] x86/tdx: Add kexec support Baoquan He
2023-11-16 12:56 ` Kirill A. Shutemov
2023-11-16 14:17 ` Baoquan He
2023-11-16 14:45 ` Baoquan He
2023-11-17 12:47 ` Kirill A. Shutemov
2023-11-17 15:03 ` Baoquan He
2023-11-17 15:46 ` Kirill A. Shutemov
2023-11-21 6:41 ` Baoquan He
2023-11-21 8:43 ` Kirill A. Shutemov
2023-11-21 9:10 ` Tao Liu
2023-11-21 9:24 ` Kirill A. Shutemov
2023-11-21 10:15 ` Baoquan He
2023-11-21 10:40 ` Kirill A. Shutemov
2023-11-21 12:50 ` Baoquan He
2023-11-28 15:45 ` Isaku Yamahata
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